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umami/components/metrics/BarChart.js

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import React, { useState, useRef, useEffect } from 'react';
import classNames from 'classnames';
import ChartJS from 'chart.js';
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import Legend from 'components/metrics/Legend';
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import { formatLongNumber } from 'lib/format';
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import { dateFormat } from 'lib/lang';
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import useLocale from 'hooks/useLocale';
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import useTheme from 'hooks/useTheme';
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import { DEFAUL_CHART_HEIGHT, DEFAULT_ANIMATION_DURATION, THEME_COLORS } from 'lib/constants';
import styles from './BarChart.module.css';
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import ChartTooltip from './ChartTooltip';
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import useForceUpdate from '../../hooks/useForceUpdate';
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export default function BarChart({
chartId,
datasets,
unit,
records,
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height = DEFAUL_CHART_HEIGHT,
animationDuration = DEFAULT_ANIMATION_DURATION,
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className,
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stacked = false,
loading = false,
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onCreate = () => {},
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onUpdate = () => {},
}) {
const canvas = useRef();
const chart = useRef();
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const [tooltip, setTooltip] = useState(null);
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const [locale] = useLocale();
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const [theme] = useTheme();
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const forceUpdate = useForceUpdate();
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const colors = {
text: THEME_COLORS[theme].gray700,
line: THEME_COLORS[theme].gray200,
zeroLine: THEME_COLORS[theme].gray500,
};
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function renderXLabel(label, index, values) {
if (loading) return '';
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const d = new Date(values[index].value);
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const w = canvas.current.width;
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switch (unit) {
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case 'minute':
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return index % 2 === 0 ? dateFormat(d, 'h:mm', locale) : '';
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case 'hour':
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return dateFormat(d, 'ha', locale);
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case 'day':
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if (records > 31) {
if (w <= 500) {
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return index % 10 === 0 ? dateFormat(d, 'M/d', locale) : '';
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}
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return index % 5 === 0 ? dateFormat(d, 'M/d', locale) : '';
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}
if (w <= 500) {
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return index % 2 === 0 ? dateFormat(d, 'MMM d', locale) : '';
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}
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return dateFormat(d, 'EEE M/d', locale);
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case 'month':
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if (w <= 660) {
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return index % 2 === 0 ? dateFormat(d, 'MMM', locale) : '';
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}
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return dateFormat(d, 'MMM', locale);
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default:
return label;
}
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}
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function renderYLabel(label) {
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return +label > 1000 ? formatLongNumber(label) : label;
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}
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function renderTooltip(model) {
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const { opacity, title, body, labelColors } = model;
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if (!opacity || !title) {
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setTooltip(null);
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return;
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}
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const [label, value] = body[0].lines[0].split(':');
setTooltip({
title: dateFormat(new Date(+title[0]), getTooltipFormat(unit), locale),
value,
label,
labelColor: labelColors[0].backgroundColor,
});
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}
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function getTooltipFormat(unit) {
switch (unit) {
case 'hour':
return 'EEE ha — MMM d yyyy';
default:
return 'EEE MMMM d yyyy';
}
}
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function createChart() {
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const options = {
animation: {
duration: animationDuration,
},
tooltips: {
enabled: false,
custom: renderTooltip,
},
hover: {
animationDuration: 0,
},
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responsive: true,
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responsiveAnimationDuration: 0,
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maintainAspectRatio: false,
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legend: {
display: false,
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},
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scales: {
xAxes: [
{
type: 'time',
distribution: 'series',
time: {
unit,
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tooltipFormat: 'x',
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},
ticks: {
callback: renderXLabel,
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minRotation: 0,
maxRotation: 0,
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fontColor: colors.text,
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},
gridLines: {
display: false,
},
offset: true,
stacked: true,
},
],
yAxes: [
{
ticks: {
callback: renderYLabel,
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beginAtZero: true,
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fontColor: colors.text,
},
gridLines: {
color: colors.line,
zeroLineColor: colors.zeroLine,
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},
stacked,
},
],
},
};
onCreate(options);
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chart.current = new ChartJS(canvas.current, {
type: 'bar',
data: {
datasets,
},
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options,
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});
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}
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function updateChart() {
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const { options } = chart.current;
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options.legend.labels.fontColor = colors.text;
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options.scales.xAxes[0].time.unit = unit;
options.scales.xAxes[0].ticks.callback = renderXLabel;
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options.scales.xAxes[0].ticks.fontColor = colors.text;
options.scales.yAxes[0].ticks.fontColor = colors.text;
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options.scales.yAxes[0].ticks.precision = 0;
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options.scales.yAxes[0].gridLines.color = colors.line;
options.scales.yAxes[0].gridLines.zeroLineColor = colors.zeroLine;
options.animation.duration = animationDuration;
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options.tooltips.custom = renderTooltip;
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onUpdate(chart.current);
chart.current.update();
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forceUpdate();
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}
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useEffect(() => {
if (datasets) {
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if (!chart.current) {
createChart();
} else {
setTooltip(null);
updateChart();
}
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}
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}, [datasets, unit, animationDuration, locale, theme]);
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return (
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<>
<div
data-tip=""
data-for={`${chartId}-tooltip`}
className={classNames(styles.chart, className)}
style={{ height }}
>
<canvas ref={canvas} />
</div>
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<Legend chart={chart.current} />
<ChartTooltip chartId={chartId} tooltip={tooltip} />
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</>
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);
}